US3601501A - Gas compressor impeller and shaft assembly - Google Patents
Gas compressor impeller and shaft assembly Download PDFInfo
- Publication number
- US3601501A US3601501A US14470A US3601501DA US3601501A US 3601501 A US3601501 A US 3601501A US 14470 A US14470 A US 14470A US 3601501D A US3601501D A US 3601501DA US 3601501 A US3601501 A US 3601501A
- Authority
- US
- United States
- Prior art keywords
- impeller
- shaft
- conical surface
- threaded
- collar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000013011 mating Effects 0.000 claims abstract description 28
- 238000004378 air conditioning Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/025—Fixing blade carrying members on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
- F16D1/093—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
- F16D1/095—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping with clamping effected by ring contraction only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
- F16B2200/403—Threaded clamping parts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/70—Interfitted members
- Y10T403/7009—Rotary binding cam or wedge
- Y10T403/7011—Radially interposed shim or bushing
Definitions
- a centrifugal gas compressor impeller is assembled to a rotatable shaft with two friction washers having conical surfaces mating with respective opposite conical surfaces of the impeller that are concentric to a central impeller aperture through which a threaded bolt is passed and threaded into a threaded aperture at the end of the rotatable shaft.
- the angles of concentricity for the conical surfaces of the washer are slightly different than the angles of concentricity of the mating impeller surfaces so that a friction lock is obtained between the shaft and impeller and also the impeller and washer apertures are slightly larger than the bolt shaft diameter so that an impeller centering relative to the shaft is assured during assembly.
- Centrifugal gas compressors are used in large air-conditioning machinery where their structural and mechanical advantages over the relatively complex reciprocating gas com- 7 pressors are appreciated. Recent developments are making PRIOR ART Applicants are not aware of any prior disclosures of the use of a friction coupling in an impeller and shaft assembly for a centrifugal gas compressor as described and claimed by the present invention.
- a centrifugal gas compressor impeller and shaft assembly is comprised of a rotatable shaft having an internally threaded endto which the impeller is to be fastened by a cap bolt passing through a central aperture of the impeller.
- Opposite faces of the impeller are provided with central conical surfaces concentric with the aperture and these conical surfaces are preferably but not necessarily inclined upwardly such that the conical rear surface of the impeller is inclined towards the end of the shaft in the assembled relation and the conical front surface of the impeller is inclined away from the end ;of the shaft in the assembled relation.
- a friction washer is interposed between the bolt cap and the impeller front conical surface and is provided with a mating conical surface having a slightly different angle of concentricity which in the preferred form of the invention is slightly greater than the angle of concentricity of the impeller front conical surface.
- a friction collar washer is interposed between the rear conical surface of the impeller and the shaft end and is provided with a mating conical surface having a slightly different angle of concentricity which in the preferred form of the invention is slightly greater than the angle of concentricity of the impeller rear conical surface.
- the end of the friction collar washer adjacent the impeller shaft in the assembled relation is counterbored slightly to provide a collar surface to overlie the shaft end to thereby provide a friction grip on the-shaft when the cap bolt is tightened to compress the friction washers and complete the assembly.
- the apertures of the friction washers and the impeller are slightly larger than the diameter of the shaft of the cap bolt so that a centering of the impeller and shaft is obtained by the interactions of the concentric surfaces when the bolt is tightened to complete the assembly.
- FIG. 1 is a fragmentary sectional side elevational view of a gas compressor for an air-conditioning machine employing the impeller and shaft assembly of the invention
- FIG. 2 is an enlarged side elevational view partly in section of the impeller and shaft assembly of the invention.
- FIG. 3 is an exploded view similar to FIG 2 but showing the parts in the disassembled relation prior to assembly.
- the centrifugal gas compressor as may be used in an air-conditioning machine or the like is shown to include a compressed gas collecting scroll l0, and a centrifugal impeller 11 concentric therewith.
- the impeller 11 is secured to the end of a rotatable shaft 12 that is driven by the pinion gear 13 and the bull gear 14.
- Suitable bearings including thrust bearings at the end of the shaft (not invention, it will be seen that the rotatable shaft 12 is provided 1 with an internally threaded bore or aperture 20 at its endto which the impeller l l is to be secured.
- a cap bolt 21 having a threaded shaft 22 is passed through a central aperture 23 of the impeller 11 and is threaded into the threaded aperture 20 of the rotatable shaft 12.
- the front side of the impeller 11 is provided with a first conical surface 24 centrally located and concentric to the impeller aperture 23.
- the rear surface of the impeller 11 is also provided with a conical surface 25 that is centrally located and concentric to the impeller aperture 23.
- a friction washer 26 is interposed between the cap bolt 21 and v the fist conical surface 24 on the front side of the impeller 11.
- the friction washer 26 is provided with a mating conical surface 28 that contacts the conical surface 24 of the impeller I l in the assembled relation.
- a friction collar washer 30 is inter posed between the rear conical surface 25 of the impeller and the threaded end of the rotatable shaft 12.
- the collar washer 30 is provided with a mating conical surface 31 that contacts the conical surface 25 on the rear of the impeller 11 in the assembled relation.
- the front conical surface 24 is inclined upwardly to extend away from the threaded end of the rotatable shaft 12 in the assembled relation while the rear conical surface 25 is also extended upwardly to extend towards the threaded end of the rotatable shaft 12 in the assembled relation.
- the conical surfaces 24 or 25 of the impeller may be inclined in other directions provided that the mating conical surfaces of the related friction washers are also similarly inclined.
- the angle of concentricity for the inclined or conical surface 28 of the first friction washer 26 is slightly different than the angle of concentricity for the conical surface 28 0f the impeller and also the angle of concentricity for the conical surface 31 of the second friction washer 30 is slightly different than the angle of concentricity for the rear conical surface 25 of the impeller 1 1.
- the angle of inclination forthe conical surface 28 of the washer 26 is slightly greater from the vertical than the'angle of inclination for the conicalsurface 24 of the impeller 11.
- the angle of inclination for the conical surface 31 of the second washer 30 is slightly greater from the vertical than the angle of inclination for the conical surface 25 of the impeller 11.
- the preferred form of the invention provides that the central apertures for the impeller 11 and the respective friction washers 26 and 30 are slightly larger in diameter than the diameter of the shaft 22 of the bolt 21.
- the impeller 11 when assembling the impeller 11 on the end of the rotatable shaft 12 by tightening the bolt 21 the impeller 11 is free to move slightly and the interaction of the concentric surfaces of the impeller and washers provides an effective centering action for centering the impeller 11 relative to the shaft 12 and its threaded central aperture 20.
- a rotatable gas compressor impeller and shaft assembly comprising, a rotatable shaft having a threaded axial bore at one end, an impeller having an axial bore therethrough and adapted to be assembled to the front of the threaded end of said shaft with a capped fastening bolt having a threaded shaft passing through the impeller axial bore and threaded into said shaft bore, the respective front and back faces of said impeller having respective first and second conical surfaces coaxial to the impeller bore and said surfaces being oppositely inclined, a first apertured friction washer adapted to receive the shaft of said bolt and to be interposed between the first conical surface of said impeller and the cap of said bolt and having a mating conical surface coaxial with its aperture adjacent the first conical surface in the assembled relation, the angle of inclination of the mating surface of the first washer being slightly different than the angle of inclination of the first conical surface of the impeller, a friction collar washer having an aperture adapted to receive the shaft of said bolt and to be interposed between the second conical
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1447070A | 1970-02-26 | 1970-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3601501A true US3601501A (en) | 1971-08-24 |
Family
ID=21765697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14470A Expired - Lifetime US3601501A (en) | 1970-02-26 | 1970-02-26 | Gas compressor impeller and shaft assembly |
Country Status (7)
Country | Link |
---|---|
US (1) | US3601501A (es) |
BE (1) | BE763358A (es) |
CA (1) | CA940898A (es) |
DE (1) | DE2106208B2 (es) |
ES (1) | ES388624A1 (es) |
FR (1) | FR2079044A5 (es) |
GB (1) | GB1285524A (es) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3914067A (en) * | 1973-11-30 | 1975-10-21 | Curtiss Wright Corp | Turbine engine and rotor mounting means |
US3941506A (en) * | 1974-09-05 | 1976-03-02 | Carrier Corporation | Rotor assembly |
US4032256A (en) * | 1975-11-14 | 1977-06-28 | Viktor Arsentievich Tatkov | Centrifugal pump |
US4074946A (en) * | 1976-07-28 | 1978-02-21 | Swearingen Judson S | Shaft-rotor coupling |
US4083641A (en) * | 1976-04-10 | 1978-04-11 | Yoshida Kogyo K.K. | T-Shaped structural joint |
US4213307A (en) * | 1978-11-13 | 1980-07-22 | Westinghouse Electric Corp. | Oil separation and return system for centrifugal refrigerant compressors |
EP0016643A1 (en) * | 1979-03-21 | 1980-10-01 | McQUAY-PERFEX INC. | Impeller and shaft assembly for high speed gas compression |
WO2000060241A1 (de) * | 1999-04-03 | 2000-10-12 | Leybold Vakuum Gmbh | Rotorbefestigung einer reibungsvakuumpumpe |
WO2001040660A3 (en) * | 1999-12-03 | 2002-01-17 | American Standard Inc | Centrifugal impeller assembly |
US20040126251A1 (en) * | 2002-10-24 | 2004-07-01 | Anthony Billington | Compressor wheel assembly |
US20050191122A1 (en) * | 2004-03-01 | 2005-09-01 | Gethmann Douglas P. | Locking mechanism for a threaded connection |
US20060127243A1 (en) * | 2004-12-14 | 2006-06-15 | Vaccarezza Stephen E | Compressor wheel |
US20070237646A1 (en) * | 2005-09-08 | 2007-10-11 | Hamilton Sundstrand Corporation | Mechanical coupling for a rotor shaft assembly of dissimilar materials |
US20120003093A1 (en) * | 2009-03-25 | 2012-01-05 | Borgwarner Inc. | Reduction of turbocharger core unbalance with centering device |
US20120189452A1 (en) * | 2010-07-20 | 2012-07-26 | Itt Manufacturing Enterprises, Inc. | Impeller Attachment Method |
CN102734216A (zh) * | 2012-07-18 | 2012-10-17 | 无锡杰尔压缩机有限公司 | 一种离心鼓风机的高速转子结构 |
US20140072444A1 (en) * | 2012-09-13 | 2014-03-13 | Andreas Eleftheriou | Rotor assembly |
US10267335B1 (en) * | 2015-09-23 | 2019-04-23 | Anthony Freakes | Methods and apparatus for mounting an impeller with positional repeatability |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20003878U1 (de) | 2000-03-02 | 2000-05-31 | Siemens AG, 80333 München | Pumpe oder Verdichter |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US776935A (en) * | 1904-05-09 | 1904-12-06 | John Vernon Pugh | Fastening for wheels and cranks. |
US924334A (en) * | 1905-02-09 | 1909-06-08 | Fouch Disc Wheel Company | Vehicle-wheel. |
US2345910A (en) * | 1939-01-04 | 1944-04-04 | Nasa | Connection for elements of rotatable units |
US2351356A (en) * | 1943-12-24 | 1944-06-13 | Federal Mogul Corp | Propeller inhibitor |
US2602683A (en) * | 1945-03-03 | 1952-07-08 | Sulzer Ag | Rotor for turbomachines |
US2726524A (en) * | 1953-09-23 | 1955-12-13 | Paul X Gorin | Friction drive coupling with overload slip |
US3467419A (en) * | 1963-04-08 | 1969-09-16 | Borg Warner | Means for securing a rotor on a shaft |
-
1970
- 1970-02-26 US US14470A patent/US3601501A/en not_active Expired - Lifetime
-
1971
- 1971-02-08 CA CA104,692A patent/CA940898A/en not_active Expired
- 1971-02-10 DE DE2106208A patent/DE2106208B2/de active Granted
- 1971-02-24 BE BE763358A patent/BE763358A/xx not_active IP Right Cessation
- 1971-02-25 FR FR7106392A patent/FR2079044A5/fr not_active Expired
- 1971-02-25 ES ES71388624A patent/ES388624A1/es not_active Expired
- 1971-04-19 GB GB23208/71A patent/GB1285524A/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US776935A (en) * | 1904-05-09 | 1904-12-06 | John Vernon Pugh | Fastening for wheels and cranks. |
US924334A (en) * | 1905-02-09 | 1909-06-08 | Fouch Disc Wheel Company | Vehicle-wheel. |
US2345910A (en) * | 1939-01-04 | 1944-04-04 | Nasa | Connection for elements of rotatable units |
US2351356A (en) * | 1943-12-24 | 1944-06-13 | Federal Mogul Corp | Propeller inhibitor |
US2602683A (en) * | 1945-03-03 | 1952-07-08 | Sulzer Ag | Rotor for turbomachines |
US2726524A (en) * | 1953-09-23 | 1955-12-13 | Paul X Gorin | Friction drive coupling with overload slip |
US3467419A (en) * | 1963-04-08 | 1969-09-16 | Borg Warner | Means for securing a rotor on a shaft |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3914067A (en) * | 1973-11-30 | 1975-10-21 | Curtiss Wright Corp | Turbine engine and rotor mounting means |
US3941506A (en) * | 1974-09-05 | 1976-03-02 | Carrier Corporation | Rotor assembly |
US4032256A (en) * | 1975-11-14 | 1977-06-28 | Viktor Arsentievich Tatkov | Centrifugal pump |
US4083641A (en) * | 1976-04-10 | 1978-04-11 | Yoshida Kogyo K.K. | T-Shaped structural joint |
US4074946A (en) * | 1976-07-28 | 1978-02-21 | Swearingen Judson S | Shaft-rotor coupling |
US4213307A (en) * | 1978-11-13 | 1980-07-22 | Westinghouse Electric Corp. | Oil separation and return system for centrifugal refrigerant compressors |
EP0016643A1 (en) * | 1979-03-21 | 1980-10-01 | McQUAY-PERFEX INC. | Impeller and shaft assembly for high speed gas compression |
US4257744A (en) * | 1979-03-21 | 1981-03-24 | Westinghouse Electric Corp. | Impeller and shaft assembly for high speed gas compressor |
WO2000060241A1 (de) * | 1999-04-03 | 2000-10-12 | Leybold Vakuum Gmbh | Rotorbefestigung einer reibungsvakuumpumpe |
US6599084B1 (en) | 1999-04-03 | 2003-07-29 | Leybold Vakuum Gmbh | Rotor fixture for a friction vacuum pump |
WO2001040660A3 (en) * | 1999-12-03 | 2002-01-17 | American Standard Inc | Centrifugal impeller assembly |
US20040126251A1 (en) * | 2002-10-24 | 2004-07-01 | Anthony Billington | Compressor wheel assembly |
US20050191122A1 (en) * | 2004-03-01 | 2005-09-01 | Gethmann Douglas P. | Locking mechanism for a threaded connection |
US7722336B2 (en) * | 2004-12-14 | 2010-05-25 | Honeywell International Inc. | Compressor wheel |
US20060127243A1 (en) * | 2004-12-14 | 2006-06-15 | Vaccarezza Stephen E | Compressor wheel |
US20070237646A1 (en) * | 2005-09-08 | 2007-10-11 | Hamilton Sundstrand Corporation | Mechanical coupling for a rotor shaft assembly of dissimilar materials |
US7527479B2 (en) * | 2005-09-08 | 2009-05-05 | Hamilton Sundstrand Corporation | Mechanical coupling for a rotor shaft assembly of dissimilar materials |
US8944771B2 (en) * | 2009-03-25 | 2015-02-03 | Borgwarner Inc. | Reduction of turbocharger core unbalance with centering device |
US20120003093A1 (en) * | 2009-03-25 | 2012-01-05 | Borgwarner Inc. | Reduction of turbocharger core unbalance with centering device |
US20120189452A1 (en) * | 2010-07-20 | 2012-07-26 | Itt Manufacturing Enterprises, Inc. | Impeller Attachment Method |
US11255340B2 (en) | 2010-07-20 | 2022-02-22 | Itt Manufacturing Enterprises Llc | Impeller attachment method |
CN102734216A (zh) * | 2012-07-18 | 2012-10-17 | 无锡杰尔压缩机有限公司 | 一种离心鼓风机的高速转子结构 |
US9353626B2 (en) * | 2012-09-13 | 2016-05-31 | Pratt & Whitney Canada Corp. | Rotor assembly |
EP2708698A3 (en) * | 2012-09-13 | 2017-04-12 | Pratt & Whitney Canada Corp. | Rotor Assembly |
US20140072444A1 (en) * | 2012-09-13 | 2014-03-13 | Andreas Eleftheriou | Rotor assembly |
US10267335B1 (en) * | 2015-09-23 | 2019-04-23 | Anthony Freakes | Methods and apparatus for mounting an impeller with positional repeatability |
Also Published As
Publication number | Publication date |
---|---|
FR2079044A5 (es) | 1971-11-05 |
CA940898A (en) | 1974-01-29 |
ES388624A1 (es) | 1974-02-16 |
GB1285524A (en) | 1972-08-16 |
DE2106208A1 (de) | 1971-09-02 |
DE2106208C3 (es) | 1980-06-19 |
DE2106208B2 (de) | 1979-10-11 |
BE763358A (fr) | 1971-08-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MCQUAY-PERFEX, INC., A CORP. OF MN, MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA;REEL/FRAME:003954/0610 Effective date: 19820204 Owner name: MCQUAY-PERFEX, INC., MINNEAPOLIS, MN A CORP. OF MN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA;REEL/FRAME:003954/0610 Effective date: 19820204 |
|
AS | Assignment |
Owner name: MCQUAY INC. Free format text: CHANGE OF NAME;ASSIGNOR:MCQUAY-PREFEX INC.;REEL/FRAME:004190/0553 Effective date: 19830528 |
|
AS | Assignment |
Owner name: SNYDER GENERAL CORPORATION, STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCQUAY INC.;REEL/FRAME:004607/0047 Effective date: 19860327 Owner name: SNYDER GENERAL CORPORATION Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MCQUAY INC.;REEL/FRAME:004607/0047 Effective date: 19860327 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT, INC., 2700 DIAMOND SHA Free format text: SECURITY INTEREST;ASSIGNOR:MCQUAY INC., A MN CORP.;REEL/FRAME:004690/0296 Effective date: 19841102 |
|
AS | Assignment |
Owner name: CITICORP INDUSTRIAL CREDIT INC.,TEXAS Free format text: SECURITY INTEREST;ASSIGNOR:SNYDERGENERAL CORPORATION;REEL/FRAME:004765/0735 Effective date: 19870630 Owner name: CITICORP INDUSTRIAL CREDIT INC., 2700 DIAMOND SHAM Free format text: SECURITY INTEREST;ASSIGNOR:SNYDERGENERAL CORPORATION;REEL/FRAME:004765/0735 Effective date: 19870630 |
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AS | Assignment |
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